[MLIR][parser] Add token type and parser methods for forward slashes (#125056)

This adds a token for a forward slash to the token definition list and
the methods to `AsmParser::parseSlash()` and
`AsmParser::parseOptionalSlash()`, similar to other tokens used as
operators (e.g., star, plus, etc.). This allows implementations of
attributes that contain arithmetic expressions to support operators with
a forward slash, e.g., a division.

The newly added check tests trigger the parsing of a slash in an
attribute.

1 files changed, 18 insertions, 0 deletions

diff --git a/mlir/test/lib/Dialect/Test/TestAttributes.cpp b/mlir/test/lib/Dialect/Test/TestAttributes.cpp
index b36f246b83d7..80661e68754c 100644
--- a/mlir/test/lib/Dialect/Test/TestAttributes.cpp
+++ b/mlir/test/lib/Dialect/Test/TestAttributes.cpp
@@ -498,6 +498,24 @@ getDynamicCustomAssemblyFormatAttr(TestDialect *testDialect) {
 }
 
 //===----------------------------------------------------------------------===//
+// SlashAttr
+//===----------------------------------------------------------------------===//
+
+Attribute SlashAttr::parse(AsmParser &parser, Type type) {
+  int lhs, rhs;
+
+  if (parser.parseLess() || parser.parseInteger(lhs) || parser.parseSlash() ||
+      parser.parseInteger(rhs) || parser.parseGreater())
+    return Attribute();
+
+  return SlashAttr::get(parser.getContext(), lhs, rhs);
+}
+
+void SlashAttr::print(AsmPrinter &printer) const {
+  printer << "<" << getLhs() << " / " << getRhs() << ">";
+}
+
+//===----------------------------------------------------------------------===//
 // TestDialect
 //===----------------------------------------------------------------------===//